http://archive.freep.com/VideoNetwork/1377438048001/BMW-emphasizes-performance-with-new-3-Seriesrtmp://cp81310.edgefcs.net/ondemand/&mp4:brightcove/35547428001/35547428001_1377500940001_bmw-FreepVideo-Brightcove.mp4http://archive.freep.com/VideoNetwork/1377438048001/BMW-emphasizes-performance-with-new-3-Serieshttp://bcdownload.gannett.edgesuite.net/detroitfreep/35547428001/35547428001_1377338348001_ari-origin07-arc-133-1326140316419.jpgBMW emphasizes performance with new 3-SeriesBMW engineers pulled out all the stops to make the new 3 Series lighter and more fuel-efficient. Making their debut: The i3 concept and ActiveHybrid 3 and ActiveHybrid 5. ALEXANDRA BAHOU/DFP15013 SeriesautosbmwfeaturedConceptapp_autoshowhybridNewsapp_mainautoshow03:11